Force-pump attachment



s. L. FRENOH & J. ANDERSON.

FORGE PUMP ATTAUHMENT.

(No Model.)

No 248,032. PatentedOot. 11, 1881.,

WzdT w/ssesl UNlTED- STATES PATENT OFFICE,

SAMUEL L. FRENCH AND JOHN ANDERSON, OF LIGONIER, PENNSYLVANIA.

FORCE-RUM P ATTACH MENT.

SPECIFICATION forming part of Letters Patent No. 248,032, dated October11, 1881.

Application filed August 17,1881.

in the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to letters or figures ofreference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a plan view, and

.Fig. 2 is a detached perspective of a portion of Fig. 1.

Like letters refer to like parts in both figures.

This invention relates to certain means for regulating thestroke of thepiston-rod and piston of a force-pump and is an improvement on thepatent granted to Samuel L. French, No. 233,667, and dated October26,1880.'

The object of thisimprovem ent is to provide a means of controlling the.amount of water supplied by a force-pump when employed in connectionwith and .for the purpose of, feeding a locomotive or other steam-boilerand it consists in certain combinations -of devices which arehereinafter described; and specifically set forth in the claims.Heretofore this result has'been accomplishedbyme'ans of slotted leverspivoted at one end to a frame arranged above the pump and steam-engine,between which is arranged a single lever, also hinged at one end incombination-with a rod provided with slides working in the slots inlevers, and said slides adjusted by a screw having its bearing upon theend of the interposed lever. It has also been in a measure accomplishedby means of mechanism well known as the Stephenson link connection,which controlled the supply of steam in the cylinders of the 1ocomotive,the piston-rod-of the feedpump having pistons within the said cylindersand therefore affected in its operation by the supply of steam thuscontrolled, each being jointly and simultaneously controlled. On thecontrary, in our improvement as herein set forth the supply of water tothe boiler is con- (No model.)

to the cylinders.- i

A A represent the frame of a locomotive with our improvements mountedthereon; B, a bed-plate bolted in any suitable manner to said frame, andhaving gibs or ways B, provided with set-screws b, in which is fittedthe fulcrum-blockG, provided with an anti-friction roller, as in thepatent above referred to, which is dovetailed to snugly fit the ways Band move from end to end therein in the usual manner.

The block 0 is provided with a vertical fulcrum pin or stud, E,over'which passes a slotted lever, F. The forward end of this slottedlever F is pivoted to a block,G, adjustably attached to the plunger-rodof the force-pump, the pipe D of said pump only being shown in thedrawings. The other end of the slotted lever is connected by meansofjointed arms to the cross-head of the steam-engine, as clearly .shownand explained in the patent above referred to.

At the back end of fulcrum-block O is pivotally attached aconnecting-rod, H, its other end being pivotally attached to an arm, I,firmly secured to an'upright shaft, J, resting in suitable bearings uponthe frame A, and supported at its upper end in a bearing made inbrackets h h, attached to the under side of the running-board of thelocomotive.

At the upper part of upright shaft J is secured rigidly-a second arm, K,projecting at a right angle to arm I, which arm K is connect'edpivotally to rod L, and this in the same manner to the operating-leverM, pivoted in bearings N on the floor of the locomotive-cab, andextending upward within easy access to the engineer.

To the lever M is attached the spring-catch O, of usual construction,adapted to be dropped into any of the nicks or slots of the arch P, alsosecured to the floor of the cab, which arch mayindicate by figures atthe slots the quantity of water supplied by the pump when the lever isin certain positions.

The outward end of the piston-rod or plunger of the pump is made squarefor strength and steadiness of operation, and passes through a bracket,R, supported in any suitable manner on the frame A.

' trolled independently of the supply of steam I Operation: As thecross-head of the engine moves with its piston it will give a movementto the slotted lever, which, in turn, will move the plunger of thei'orce-pum By adjusting the block 0 inwardly on the transverse plate Band ways B the stroke of the plunger is shortened and the supply ofwater to theboiler is diminished, and by adjusting the block 0 in theopposite direction the length of the stroke is increased and the amountof water forced into the boiler is correspondingly enlarged, andthiswithout I'BFGFEHCGflJGTSC, to the amount of steam consumed in thecylinders of the 10- comotive. Hence by this adjustment a wellsuppliedboiler yielding sufficient steam for consumption by the cylinders whenworking rapidly and under a heavy load maybe gradually and moderatelysupplied with waterindependent of the energetic and rapid work of thepiston and cross-head; or the boiler may be rapidly filled when thepiston is working either slowly or rapidly, and a uniiorm,stcady supplyof water may be had at any and all times, irrespective of the speed orwork accomplished by the locomotive, the time employed in furnishing thesupply, and the quantity of supply in a given time being directly underthe control of the engineer. Suppose the locomotive with its ordinarytrain is traveling at moderate speed, the boiler well filled, and thecylinders consuming a normal amount of steam. The operating-lever Mstands upright, with the catch 0 in the central slot of the arch P. Thewater in the boiler is discovered to be low. The engineer throws theoperating-lever to the front. This draws lever K to the rear and lever Ioutwardly, and this draws the fulcrum-block (J and the fulcrum E awayfrom block Gr, thus lengthening the innerarm 0t" lever F, causing itsmovement at the inner end to be through a greater distance, thusincreasing the length of the stroke of the plunger, and consequently thesupply of water to the boiler. The reversal of these movements producesa contrary efl'ect.

Having shown and described the invention, what we claim as new and wishto secure by Letters Patent, is-

1. The combination, with the plunger of a force-pump, of the slottedlever, the sliding fulcrum-block, and means, substantially as shown anddescribed, for securing said block in desired position, a shaft providedwith rigidly-connected arms, the one placed at a right angle to theother, the connecting-levers, and the operating-lever, all substantiallyas shown and described.

2. In combination with the frame of a locomotive, the bed-plate B,provided with the ways 13, the fulcrum-block 0, having fulcrum E,slotted lever F, and block G, connectingrod H, arm I, and shaft J, withmeans, substantially as shown and described, for operating said arm, asand for the purpose set forth.

3. The combination of the operating-lever M, having catch 0, slottedarch P, lever L, shaft J, arms K I, rod H, fulcrum-block 0,1ever F, andblock G, substantially as shown and described.

In testimony whereot' we have affixed our signatures in presence of twowitnesses.

SAMUEL L. FRENCH. JOHN ANDERSON. Witnesses: A .JNo. Q. A. BUSTED,

H. BLACK.

